Tank top



FIG. 1 is a front view of a tank top according to the design;

FIG. 2 is a rear view thereof; and,

FIG. 3 is a rear view thereof shown in an environment of use.

The portions of the tank top shown in broken lines in FIGS. 1-3 form no part of the claimed design. The broken line showing of the arms, legs, torso, neck, and head in FIG. 3 is for the purpose of illustrating portions of the environmental structure and forms no part of the claimed design. 

CLAIM The ornamental design for a tank top, as shown and described. 